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Proof step 27 from proof bitsor-com (previous step)

∀ bits, bits1. # bits1 < # true ' → true → bits ≠ [] ∧ bits1 ≠ [] → bitsor(bits, bits1) = bitsor(bits1, bits) ⊦ true ' = bitsor(true ', bits), bits = []

User applied rule insert rewrite lemma

And obtained the following new goals

Proof step 28:
⊦ bits0 ≠ [] ∧ bits = true ' → bitsor(bits, bits0) = true '

Rule argument

name: or-rec-03 rotate: F subst: [bits0, bits] → [bits, true ']

Additional information

Used terms: bits, true '